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Bash Redirect Error Output To Variable


cat *.txt | sort | uniq > result-file # Sorts the output of all the .txt files and deletes duplicate lines, # finally saves results to "result-file".

&1; declare -p bout >&2); declare -p berr; } 2>&1) So, what's happening here? Check This Out

After checking this, I know I won't make this mistake again. –Stephan Oct 11 '12 at 14:34 @Stephan cheers, this has also been discussed here. :) –Shadow Wizard Oct Subtraction with a negative result A name for a well-informed person who is not believed? Sadly, I end up with a solution similar to Mr. Fork.

Bash Redirect Output To Variable Filename

Least Common Multiple American English: are [ə] and [ʌ] different phonemes? Related 364Redirect stderr and stdout in a Bash script728How can I redirect and append both stdout and stderr to a file with Bash?544How to pipe stderr, and not stdout?28Bash script - I accepted a counter offer and regret it: can I go back and contact the previous company? I still want the standard output, and I want it to do other things, go other places. –psycotica0 Jun 7 '09 at 16:50 add a comment| up vote 2 down vote


There are always three default files [1] open, stdin (the keyboard), stdout (the screen), and stderr (error messages output The nominal way to execute the command ret=`eval ./segfault` is: Create a pipe. To avoid clobbering files in the current directory, you want to use mktemp to create out.log and err.log in /tmp, and then delete them afterword. –Adam Crume Jul 16 '15 at Bash Capture Stderr To Variable But at least the ugly stuff is wrapped in a function.

command < input-file > output-file # Or the equivalent: < input-file command > output-file # Although this is non-standard. How to pluralize "State of the Union" without an additional noun? Limit involving exponentials and arctangent without L'Hôpital Why does Windows show "This device can perform faster" notification if I connect it clumsily? Then: { bout=$(banana); } 2>&1; declare -p bout >&2 will do as above, but will also display on the terminal (via stderr) the content of bout with the declare builtin: this

add a comment| 4 Answers 4 active oldest votes up vote 43 down vote accepted Try redirecting stderr to stdout and using $() to capture that. Bash Capture Stderr To File share|improve this answer answered Dec 10 '12 at 18:12 anubhava 380k32159231 Sorry, I forgot to specify without temp files. –djechlin Dec 10 '12 at 18:13 add a comment| up In the case of Zsh, it's lower-cased pipestatus). Fix shell terminal after cat-ing a binary or echoing some encrypted content.

Bash Redirect Command Output To Variable

Skipping directly to level 4 How to make different social classes look quite different? share|improve this answer edited Jun 28 '10 at 6:58 answered Jun 28 '10 at 6:25 hlovdal 15.2k65399 add a comment| up vote 0 down vote dd writes both stdout and stderr: Bash Redirect Output To Variable Filename Join them; it only takes a minute: Sign up Bash how do you capture stderr to a variable? [duplicate] up vote 15 down vote favorite 5 This question already has an Bash Redirect Error Output To File IT, Linux bash, stderr, stdout Comments are closed.

share|improve this answer answered Jun 8 '09 at 0:36 FD Gonthier add a comment| up vote 1 down vote Here's how I did it : # # $1 - name of his comment is here What type of sequences are escape sequences starting with "\033]" Why don't most major game engines use gifs for animated textures? Finally, we use a process substitution to source the content of these lines. In the shell version you tried, the optimizer didn't recognize this situation (it could have performed a tail call, but it should have set up the redirection differently). Bash Redirect Error Output To /dev/null

ls -yz 2>&1 >> command.log # Outputs an error message, but does not write to file. # More precisely, the command output (in this case, null) #+ writes to the file, Owens 47.3k9101190 2 This is the reason I included the pipe in my example. stderr is redirected to stdout, which is then redirected to a file. this contact form Do COB LEDs usually need electrically insulating from the heatsink?

I am not certain I understand the issue well enough at this point to determine how to resolve it yet. –John Mark Mitchell Apr 13 at 20:36 @gniourf_gniourf My Bash Capture Stderr And Stdout To Variable Not the answer you're looking for? For example, the output of all the commands in the list may be redirected to a single stream.() ( list ) Placing a list of commands between parentheses causes a subshell

share|improve this answer edited Jun 28 '10 at 6:29 answered Jun 28 '10 at 6:19 Adam Crume 10.2k53547 I don't think this works.

LOGFILE=script.log echo "This statement is sent to the log file, \"$LOGFILE\"." 1>$LOGFILE echo "This statement is appended to \"$LOGFILE\"." 1>>$LOGFILE echo "This statement is also appended to \"$LOGFILE\"." 1>>$LOGFILE echo "This Activate Hearthstone season chest cards? printf -v $error "%s" \ "$(echo "$output" | gawk -v Var="error" "$evaloutput")" printf -v $result "%s" \ "$(echo "$output" | gawk -v Var="result" "$evaloutput")" return $(echo "$output" | gawk "$evaloutput") } Bash Redirect Stdout And Stderr To Different Variables more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

We have "swapped" FD 1 and FD 2. 3>&- /dev/tty /dev/tty pipe Finally, we close FD 3 as it is no longer necessary. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Or are you capturing/redirecting it's output? navigate here In French, colon is usually preceded by a space.